Question

branching
ibs\ of bone present in spongy bone are known as:

lamellae
canaliculi
trabeculae
lacunae

question 31
what accounts for the majority of bone (osseous) tissue matrix?

osteoid
collagen fibers
calcium salts
bone marrow

Explanation:

Analyze the first question

The first question asks: "Branching 'ribs' of bone present in spongy bone are known as:"

• Lamellae: Concentric rings of matrix found in compact bone osteons.
• Canaliculi: Tiny canals connecting lacunae.
• Trabeculae: The branching, needle-like lattice structures characteristic of spongy (cancellous) bone.
• Lacunae: Small cavities containing osteocytes.

Therefore, the correct choice is trabeculae. This relates to Skeletal Anatomy and Bone Histology.

Analyze the second question (Question 31)

The second question asks: "What accounts for the majority of bone (osseous) tissue matrix?"

• Osteoid: The organic part of the matrix (mostly collagen), making up about 1/3 of the matrix.
• Collagen fibers: Part of the organic matrix.
• Calcium salts: Inorganic mineral salts (primarily hydroxyapatite, a form of calcium phosphate) make up about 2/3 (the majority) of the bone matrix weight, providing hardness.
• Bone marrow: Soft tissue filling the cavities, not part of the extracellular matrix itself.

Therefore, calcium salts account for the majority of the bone tissue matrix.

Summarize the findings

• For the first question, the branching structures in spongy bone are trabeculae.
• For Question 31, the component making up the majority of the bone matrix is calcium salts.

Answer:

Question 1

• (A) lamellae
• (B) canaliculi
• (C) trabeculae (Correct answer)
• (D) lacunae

Question 2

• (A) osteoid
• (B) collagen fibers
• (C) calcium salts (Correct answer)
• (D) bone marrow